diff --git a/compiler/systems/i_amiga.pas b/compiler/systems/i_amiga.pas
index e184b2c14a..9f6dab2ed5 100644
--- a/compiler/systems/i_amiga.pas
+++ b/compiler/systems/i_amiga.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for the AmigaOS. }
 unit i_amiga;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_atari.pas b/compiler/systems/i_atari.pas
index 9ecbcab126..260a8c1239 100644
--- a/compiler/systems/i_atari.pas
+++ b/compiler/systems/i_atari.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for atari. }
 unit i_atari;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_beos.pas b/compiler/systems/i_beos.pas
index e9e8e27547..ba0bdbe132 100644
--- a/compiler/systems/i_beos.pas
+++ b/compiler/systems/i_beos.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for BeOS. }
 unit i_beos;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_bsd.pas b/compiler/systems/i_bsd.pas
index bfbadb5333..6daa0f7b30 100644
--- a/compiler/systems/i_bsd.pas
+++ b/compiler/systems/i_bsd.pas
@@ -24,6 +24,8 @@
 
 unit i_bsd;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_embed.pas b/compiler/systems/i_embed.pas
index c50578c52d..fe7e1f613f 100644
--- a/compiler/systems/i_embed.pas
+++ b/compiler/systems/i_embed.pas
@@ -20,6 +20,8 @@
 }
 unit i_embed;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_emx.pas b/compiler/systems/i_emx.pas
index ba9f9310fe..b7666f4052 100644
--- a/compiler/systems/i_emx.pas
+++ b/compiler/systems/i_emx.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for OS/2 via EMX. }
 unit i_emx;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_gba.pas b/compiler/systems/i_gba.pas
index 659b9b2b3c..35a4406a22 100644
--- a/compiler/systems/i_gba.pas
+++ b/compiler/systems/i_gba.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for gba. }
 unit i_gba;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_go32v2.pas b/compiler/systems/i_go32v2.pas
index a6da7ff3be..8d132620f7 100644
--- a/compiler/systems/i_go32v2.pas
+++ b/compiler/systems/i_go32v2.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for go32v2. }
 unit i_go32v2;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_haiku.pas b/compiler/systems/i_haiku.pas
index f7bdaf824a..41bc7ecf68 100644
--- a/compiler/systems/i_haiku.pas
+++ b/compiler/systems/i_haiku.pas
@@ -22,6 +22,8 @@
 { This unit implements support information structures for Haiku. }
 unit i_haiku;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_linux.pas b/compiler/systems/i_linux.pas
index 0a945ea52a..50461b0b72 100644
--- a/compiler/systems/i_linux.pas
+++ b/compiler/systems/i_linux.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for linux. }
 unit i_linux;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
@@ -689,3 +691,4 @@ initialization
   {$endif linux}
 {$endif CPUARM}
 end.
+
diff --git a/compiler/systems/i_macos.pas b/compiler/systems/i_macos.pas
index 048f5e6bfb..4f1cd21e80 100644
--- a/compiler/systems/i_macos.pas
+++ b/compiler/systems/i_macos.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for MacOS. }
 unit i_macos;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_morph.pas b/compiler/systems/i_morph.pas
index 132f97e93d..b946e5393b 100644
--- a/compiler/systems/i_morph.pas
+++ b/compiler/systems/i_morph.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for the MorphOS. }
 unit i_morph;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_nds.pas b/compiler/systems/i_nds.pas
index 6761579c0a..2cf930817f 100644
--- a/compiler/systems/i_nds.pas
+++ b/compiler/systems/i_nds.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for nds. }
 unit i_nds;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_nwl.pas b/compiler/systems/i_nwl.pas
index af9997d263..3bf3b0266a 100644
--- a/compiler/systems/i_nwl.pas
+++ b/compiler/systems/i_nwl.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for Netware libc modules. }
 unit i_nwl;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_nwm.pas b/compiler/systems/i_nwm.pas
index a984fdda8e..0f063baac6 100644
--- a/compiler/systems/i_nwm.pas
+++ b/compiler/systems/i_nwm.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for Netware modules. }
 unit i_nwm;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_os2.pas b/compiler/systems/i_os2.pas
index 1ead9cff0a..bb2170c4dd 100644
--- a/compiler/systems/i_os2.pas
+++ b/compiler/systems/i_os2.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for OS/2. }
 unit i_os2;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_palmos.pas b/compiler/systems/i_palmos.pas
index b435d70e54..c2ba01133c 100644
--- a/compiler/systems/i_palmos.pas
+++ b/compiler/systems/i_palmos.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for PalmOS. }
 unit i_palmos;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_sunos.pas b/compiler/systems/i_sunos.pas
index b6d0ae2f3e..72ccb8f7c3 100644
--- a/compiler/systems/i_sunos.pas
+++ b/compiler/systems/i_sunos.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for solaris. }
 unit i_sunos;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_symbian.pas b/compiler/systems/i_symbian.pas
index c416d43632..33b0f4bd77 100644
--- a/compiler/systems/i_symbian.pas
+++ b/compiler/systems/i_symbian.pas
@@ -22,6 +22,8 @@
 { This unit implements support information structures for win32. }
 unit i_symbian;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_wdosx.pas b/compiler/systems/i_wdosx.pas
index 9860009948..ea261cf215 100644
--- a/compiler/systems/i_wdosx.pas
+++ b/compiler/systems/i_wdosx.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for wdosx. }
 unit i_wdosx;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses
diff --git a/compiler/systems/i_win.pas b/compiler/systems/i_win.pas
index a75586d564..bb15f293b2 100644
--- a/compiler/systems/i_win.pas
+++ b/compiler/systems/i_win.pas
@@ -21,6 +21,8 @@
 { This unit implements support information structures for win32. }
 unit i_win;
 
+{$i fpcdefs.inc}
+
   interface
 
     uses